As i pointed out Tv and M dont solve anything with this. Read and understand.

Sure they do.

If you are shooting in bright sunlight and need to go low and fast, then M is perfect and add either a ND or speedlight as needed.

I would be far more concerned with the camera mismetering when trying to shoot an action shot at speeds of 500 or more, especially if you are dealing with objects such as cars, or anything else that can reflect light.